Single row deep groove ball bearings for tumble dryer dums
Improved efficiency of tumble dryers has developed because of increased attention to environmental pollution. The efficiency of a dryer is determined by an "energy factor" coefficient which measures the Kg of clothing per Kilowatt-hour of electricity. The operating concept consists of a rotating drum (50/100 rpm) with a heated air flow moving over clothes. The two types of dryer provide energy in different ways:
- electric dryers have heating elements
- gas dryers use a gas burner
Both types of Dryers are subject to requirements of silent running and high efficiency with an expectation of long service life. A small electric motor (commonly a single-phase induction motor) drives a drum while a ventilating fan provides the hot air through the clothes.